Iranian Foreign Minister Mohammad Javad Zarif says nuclear talks with six world powers will not finish on Monday, amid reports of deadlock over a U.N. arms embargo and other sticking points.
The sides have been close to a deal to give Iran sanctions relief in exchange for limits on its nuclear program.
But there have been no concrete signs of a breakthrough as diplomats in Vienna continue to struggle over issues such as U.N. sanctions and access to Iranian military sites.
In Washington, White House press secretary Josh Earnest says significant issues remain to be resolved.
"The thing that I can tell you is that they have made genuine progress in those conversations, and I think even over the
